base_color = self.properties["base_color"] = MaterialProperty((0.8, 0.8, 0.8, 1.0))
metalness = self.properties["metalness"] = MaterialProperty(0.0)
roughness = self.properties["roughness"] = MaterialProperty(0.5)
base_color = self.properties["base_color"] = MaterialProperty((0.8, 0.8, 0.8, 1.0))
metalness = self.properties["metalness"] = MaterialProperty(0.0)
roughness = self.properties["roughness"] = MaterialProperty(0.5)